SB20260507285 - Out-of-bounds write in Linux kernel ocfs2

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Main Vulnerability Database SB20260507285

SB20260507285 - Out-of-bounds write in Linux kernel ocfs2

Published: May 7, 2026

Security Bulletin ID SB20260507285
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-43075)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in ocfs2_write_end_inline when processing writes during copy_file_range splice fallback on a corrupted ocfs2 filesystem mounted on a loop device. A local user can trigger the kernel to write past the inode block buffer to cause a denial of service.

The issue is caused by trusting the on-disk id_count field beyond the physical maximum inline data capacity.


Remediation

Install update from vendor's website.

References